While working on a network security assessment (internal, external, redteam gigs etc.), we often come across vulnerable 3rd-party web applications or web front-ends that allow us to compromise the remote server by exploiting publicly known vulnerabilities. Some of the common & favorite applications are Apache Tomcat administrative interface, JBoss jmx-console, Hudson Jenkins and so on.

If you search through Exploit-db, there are over 10,000 remotely exploitable vulnerabilities that exist in tons of web applications/front-ends and could allow an attacker to completely compromise the back-end server. These vulnerabilities range from RCE to malicious file uploads to SQL injection to RFI/LFI etc.
Yasuo is built to quickly scan the network for such vulnerable applications thus serving pwnable targets on a silver platter.

Examples
./yasuo -r 127.0.0.1 -p 80,8080,443,8443 -b form
The above command will perform port scan against 127.0.0.1 on ports 80, 8080, 443 and 8443 and will brute-force login for all the applications that implement form-based authentication.

./yasuo -f my_nmap_output.xml -b all
The above command will parse the nmap output file “my_nmap_output.xml” and will brute-force login for all the applications that implement form-based and http basic authentication.